By PiThagoras

0

Posted: 2013-09-16

Circumference of a Circle

Circumference of a Circle

$$$C = 2 \pi r = \pi d$$$

*"Circumference is the linear distance around the outside of a closed curve or circular object."* It can be calculated using the above, where **C** is the circumference using either the radius (**r**) or the diameter (**d**), depending on what's convenient.

More info can be found here: *https://en.wikipedia.org/wiki/Circumference*